Finding the Third Proportional to 1,485,340 and 2,165,418

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485,340 : 2,165,418 = 2,165,418 : x
2. Step 2: Convert to fraction form
   1,485,340/2,165,418 = 2,165,418/x
3. Step 3: Cross multiply
   1,485,340x = 2,165,418 × 2,165,418
4. Step 4: Simplify right side
   1,485,340x = 4,689,035,114,724
5. Step 5: Solve for x
   x = 4,689,035,114,724/1,485,340
6. Step 6: Final answer
   x = 3,156,876.62